The incident occurred on Pioneer Way NW at NW Edgewater Boulevard at approximately 8:30 p.m.
Investigators said a car struck two young women from behind and pushed them into a ditch.
One of the women sustained serious injuries, and was airlifted to Harborview Medical Center in Seattle. Her injuries are said to be non-life threatening.
The second pedestrian sustained minor injuries.
The involved driver fled the scene and remains at large.
Investigators have not found any witnesses, and a description of the sought car was not available.
Anyone with information on the incident is urged to call the Kitsap County Sheriff's Office at 360-308-5400 immediately.